An analysis of the influence of a deviation of atomic composition from stoichiometry performed by the Monte Carlo method using a NiAl intermetallide as an example in the course of its cooling demonstrates that such deviation is an important factor in the region of pretransitional low-stability structural-phase states preceding transformation. The short-range order parameter values in non-stoichiometric alloys in their absolute values are essentially lower than those of a stoichiometric intermetallide; hence the tendency towards atomic ordering in non-stoichiometric intermetallics is noticeably lower than that in the stoichiometric alloys. The behavior of the temperature plots of the long-range order parameter in non-stoichiometric alloys during their cooling is considerably different from that of a stoichiometric intermetallide. In the case of cooling of non-stoichiometric alloys, a considerable degree of overcooling is required for the long-range order to set, and the formation of ordered phases occurs at much lower temperatures. Moreover, the temperature plot of long-range parameter of the Ni45Al55 alloy lies somewhat lower than that of the Ni55Al45 alloy, which implies that setting of the longrange order in these non-stoichiometric alloys occurs in different ways. It is underlined that a deviation of the system’s composition from stoichiometry gives rise to an essential refinement of the ordered and disordered regions.
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References
S. V. Kositsyn and I. I. Kositsyna, Usp. Fiz. Met., 9, 195–258 (2008).
A. I. Potekaev, M. D. Starostenkov, and V. V. Kulagina, The Influence of Point and Planar Defects on Structural-Phase Transformations in the Pretransitional Low-Stability Region of Metallic Systems (Ed. A. I. Potekaev) [in Russian], NTL Publ., Tomsk (2014).
N. A. Koneva, L. I. Trishkina, A. I. Potekaev, and E. V. Kozlov, Structural-Phase Transformations in Low-Stability states of Metallic Systems during Thermal-Force Interaction [in Russian] (Ed. A. I. Potekaev), NTL Publ., Tomsk (2015).
P. A. Chaplygin, M. D. Starostenkov, A. I. Potekaev, et al., Russ. Phys. J., 58, No. 4, 485–491 (2015).
A. A. Chaplygina, P. A. Chaplygin, M. D. Starostenkov, et al., Fund. Probl. Sovr. Materialoved., 13, No. 3, 403–407 (2016).
A. A. Chaplygina, A. I. Potekaev, P. A. Chaplygin, et al., Russ. Phys. J., 59, No. 5, 605–611 (2016).
V. V. Kulagina, A. A. Chaplygina, Попова Л. А. et al., Russ. Phys. J., 55, No. 7, 814–824 (2012).
A. A. Klopotov, A. I. Potekaev, E. V. Kozlov, and V. V. Kulagina, Russ. Phys. J., 54, No. 9, 1012–1023 (2011).
A. I. Potekaev, A. A. Chaplygina, V. V. Kulagina, et al., Russ. Phys. J., 60, No. 2, 215–226 (2017).
A. A. Klopotov, L. I. Trishkina, T. N. Markova, et al., Bull. RAS. Physics, 80, No. 11, 1576–1578 (2016).
A. A. Chaplygina, A. I. Potekaev, P. A. Chaplygin, et al., Fund. Probl. Sovr. Materialoved., 13, No. 2, 155–161 (2016).
A. I. Potekaev, A. A. Chaplygina, V. V. Kulagina,. et al., Russ. Phys. J., 59, No. 10, 1532–1542 (2016).
G. M. Poletaev, A. I. Potekaev, M. D. Starostenkov, et al., Russ. Phys. J., 58, No. 1, 42–47 (2015).
A. I. Potekaev, Морозов М. М., A. A. Klopotov, et al., Izvestiya VUZov. Chern Metallurg., 58, No. 8, 589–596 (2015).
A. I. Potekaev, A. A. Chaplygina, P. A. Chaplygin, et al., Russ. Phys. J., 60, No. 9, 1590–1599 (2017).
A. I. Potekaev, A. A. Chaplygina, P. A. Chaplygin, et al., Russ. Phys. J., 60, No. 10, 1577–1585 (2017).
A. I. Potekaev, A. A. Chaplygina, P. A. Chaplygin, et al., Russ. Phys. J., 61, No. 3, 412–427 (2018).
A. I. Potekaev, A. A. Chaplygina, P. A. Chaplygin, et al., Russ. Phys. J., 62, No. 1, 2218–2224 (2019).
I. Iveronova and A. A. Kanzelson, Short-Range Order in Solid Solutions [in Russian], Nauka, Moscow (1977).
M. A. Krivoglaz and A. A. Smirnov, The Theory of Ordering Alloys, Fizmatgiz, Moscow (1958).
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 123–132, February, 2019.
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Potekaev, A.I., Chaplygina, A.A., Chaplygin, P.A. et al. The Influence of Variations in Atomic Composition on Low-Stability Pretransitional Structural-Phase States of a NiAl Intermetallic Compound. Russ Phys J 62, 323–332 (2019). https://doi.org/10.1007/s11182-019-01715-x
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DOI: https://doi.org/10.1007/s11182-019-01715-x